Hisense RB645N4BIE User's Operation Manual page 46

Switch
You can switch on or switch off your
appliance by press this button.
Press " " for 3 seconds, after a buzzer
sound, meanwhile the digital light will show
"OF", the appliance will be turned off.
Press " " for 3 seconds, after a buzzer
sound, the appliance will be turned on.
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Alarm
When the door of fridge has been opened
for over 2 minutes, the door alarm will
sound. In case of door alarm, buzzer will
sound 3 times every 1 minute and will stop
alarming automatically after 8 minutes.
To save energy, please avoid keeping the
door open for a long time when using the
appliance. The door alarm can also be
cleared by closing the door.
Note: High temperature setting will
accelerate food waste.
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